求下列各未知数的值:(1)16(x²+1)=17 (2)(2x+1)²=(-5)²
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![求下列各未知数的值:(1)16(x²+1)=17 (2)(2x+1)²=(-5)²](/uploads/image/z/1645831-55-1.jpg?t=%E6%B1%82%E4%B8%8B%E5%88%97%E5%90%84%E6%9C%AA%E7%9F%A5%E6%95%B0%E7%9A%84%E5%80%BC%EF%BC%9A%EF%BC%881%EF%BC%8916%EF%BC%88x%26%23178%3B%EF%BC%8B1%EF%BC%89%EF%BC%9D17+%EF%BC%882%EF%BC%89%EF%BC%882x%EF%BC%8B1%EF%BC%89%26%23178%3B%EF%BC%9D%EF%BC%88%EF%BC%8D5%EF%BC%89%26%23178%3B)
求下列各未知数的值:(1)16(x²+1)=17 (2)(2x+1)²=(-5)²
求下列各未知数的值:(1)16(x²+1)=17 (2)(2x+1)²=(-5)²
求下列各未知数的值:(1)16(x²+1)=17 (2)(2x+1)²=(-5)²
(1)16(x²+1)=17
16x²+16=17
16x²=1
x²=1/16
x=±1/4
(2)(2x+1)²=(-5)²
(2x+1)²=25
2x+1=±5
x=2或x=-3
1. 16(x²+1)=17
16x^2=1
x^2=1/16 x=±1/4
2. (2x+1)²=(-5)²=25
2x+1=±5
2x=-1+5或2x=-1-5
x=2或x=-3